JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objectives

To learn principles of different levels of wastewater treatment viz., primary,

secondary, and tertiary levels.

Course Outcomes:

• Knowledge of design and operational concepts of different wastewater treatment units.
• An outlook on treatment and disposal of sludge from wastewater treatment units. By product recovery

UNIT - I

Water Pollution and Treatment: Types and Sources, quality of water, various stages of treatment Water treatment process: aeration, Sedimentation, Filtration: slow and rapid sand filters.

UNIT - II

Waste Water Treatment Characterization and degree of treatment: Self purification in a stream, characteristics of waste water and treatment plant effluents, Dissolved oxygen, Esturine pollution Primary treatment: Screening, Grit removal, Neutralization, equalization, Sedimentation, Flotation (oil & grease removal), Air stripping Secondary treatment: principles of waste treatment, basic kinetic equation, continuous flow treatment models, oxygen requirement in aerobic process, production of sludge. Conventional biological process: Activated Sludge Process (ASP), UASB and Trickling Filters. Biological waste treatment: RBC, Nitrogen removal: Nitrification and denitrification process, phosphorous removal, u- tube aeration system, anaerobic filters. Low cost wastewater treatment: Aerated lagoons, stabilization ponds, oxidation ditches.

UNIT - III

Tertiary Treatment of Wastewater Tertiary treatment – ion exchange, Membrane separation Techniques: Brief description of MF, UF, NF membranes. Reverse osmosis principle, Membrane materials, Types of membranes – Plate & frame, tubular, hollow fibre, spiral wound membranes, application of membranes in various industrial applications., electro chemical techniques : electro dialysis, electro coagulation, Evaporators : forces evaporation, Multiple effect evaporators – falling film, raising film, forced circulation, agitated thin film driers. Advanced oxidation process, photo catalysis.

UNIT - IV

Sewage Treatment and Disposal: Introduction, importance of sewage, Characteristics of sewage, Sampling and analysis of sewage, Sewage treatment and disposal : Skimming, Grit chamber, Sedimentation tanks, Septic tank, Secondary treatment-types of filters, rate of filter loading, Activated sludge process, sludge digestition, Sludge disposal.

UNIT - V

Industrial Wastewater Treatment : Sources, Characteristics, methodology and process for the treatment of industrial wastes of sugar industry- beverage industry – tannery industry – textile mill waste industry – fertilizer plant – steel plant – oil refinery – paper and pulp mill. Legislation, Cleaner technologies: Water conservation.

TEXT BOOKS:

• 1. Water Supply and Sanitary Engineering G.S. Bridie & J.S. Brides, Dhanpat Rai & Sons 1993.
• 2. A Treatise on Rural, Municipal, and industrial water management KVSG Murali Krishna.
• 3. Environmental sanitation (Social and Preventive medicine) Dr. P.V. Rama Raju & KVSG Mural Krishna.
• 4. Waste Water engineering, treatment and reuse by Metealf and eddy, fifth edition, Tata McGraw Hill.

REFERENCE BOOKS:

• 1. Municipal and Rural Sanitation – Ehlers, V.M. & Steel, E.W. Mc. GRAW-HILL Book Company, Inc V edition, 1987.
• 2. Environmental Sanitation, Ehlers, V.M. add Steel, E.W., McGraw-Hill Book Co., Inc.
• 3. Environmental pollution and Toxicology, Meera Asthana and Asthana D.K., Alka Printers (1994).